Calculating-machine.



PATBNTED JUNE12,4 1906.

C. A. MEILICKE. GALCULATING MACHINB.

APPLICATION PLLBD mms; 1905. i

- 3 SHEETS-SHEET 2.

Uit-*iran s 'rnrns PATENT ernten.

CARL Alt-N() MEILIUKE, OF .UANL-EY, CANADA.

CALCULATlNG-MACHINE.

Specification of Letters Patent.

Patented June 12v, 1906.

Application filed June 9, 1905. Serial No. 264,417. i

which the following is a -full, clear, and eXact description.

This invention relates to calculating-Inachines. v f Y The object olI the invention is to produce a -siinple mechanism which will enable charges or aerounts of different kinds to be easily computed.4 f

The invention is especially applicabley 'in computing interest upon notes, but is capa ble of use in variousconnections for the general purposes stated. l

The invention consists in the construction and eon'ibination of parts', to be more fully described hereinafter and definitely set forth 4in'the claims.. l 4

Reference isllto be hadto the accompany-- ing drawings, forming a part of this specification, in which similar characters of reference i udieate correspondingparts in alltlie-figures.

Figure 1 is a plan of the machine, the centrnl portion thereof being broken away, as will appear. Fig. l is a transverse section taken substantially upon the line 2 "2 of Fig. 3, eeri'nin parts being broken away, as will ap ear.

Fig. 3 is a vertical central section throng the much me., the body ofthe machine being broken ii-way, as will appear. Fig.'4 is awertical transverse section taken substantially upon the line vi 4 ol' Fig. I. Fig'. is a vertical section taken through the wall of the machine and illustratiug means for holding the drum to facilitaie the reading of the results. sents a portion of the table carried by the drum and a calendar which cooperates therewith, and Fig. 7 is a similar view representing a portion of a scale which cooperates with the calendar and table. shown in Fig. 6.'

Referring more particularly to the parts, 1 represents-a caseor barrel' of substantially cylindrical for-m disposed with its axis liori' zontah said casing being formed below into a suitable base 2, adaptedto rest. upon a horiz ontal support, suchas a table or shelf.4 This barrel 1 is formed in two sections comprising a body 3 and a removable bonnet or cover 4,

the said bonnet beingattach'ed to the body by bolts or rivets 5, passing through alined ears 6, as indicated most clearly in Fig. 2.

The ends of this barrel 1 are formed into heads 7 and 8, which are of obtuse conical forni, as indicated. At a suitable point, preferably upon the upper side, the-wall of the case orl barrel 1 is provided with an. elongated' dinally of the ease, as indicate just below this sight-opening 9 the wall ofthe case is provided with a longitudinalV groove or recess 10, in which a scale 11 is inserted, as indicated. The purpose of this scalewill appear more fully hereinafter.

Preferably above the sight-opening 9 a longitudinal groove or recess 12 is provided which issimilar to the groove 1() aforesaid,

4but of greater width, as indicated; This groove is adapted to receive a slide 13, the 'purpose of which will be described more fully hereinafter.

lVitliin the ease 1 a drum 14 of cylindrical form is rotatably mounted, the samebeing rigidly eairiedupon a shaft or axle 15.' This vaxle pases axially through the heads 7 and 8 and just without the head 7 is provided with a thumb-head 16,whieh enables the drum to be rotated as desired.

Rotatably mounted upon the shaft 15 a wheel 17 is provided, said wheel having a disk-body 1S and a circumferentiallydisposed flange 19, said flange being of the same diameter as the drum 14 and lying adjacent to the extremity of said drum, as indicated.

To the body 1H a hub 20 is rigidly attached, whichv is formed with a tubular neck 21, within which the aforesaid shaft 15 lies, asindicated. At a suitable point a eircumferential groove 22 is formed in the shaft 15, and a set-screw 23 is inserted in the neck 21, which is received in the said groove and locks the wheel- 17 against longitudinal movement -with respect to the shaft, as will be readily understood.

' As indicated most clearly in Fig. the eX- tremity of the hub() projects beyond the head 8 and receives over it a sleeve 24, which is formed integrally with a thumb-head 25. This thumb-head enables the wheel i7 to be rotated at will, and to this end the bore ol' t he sleeve 24 is provided with longitudinal` grooves 26, in which grooves oppositely-dis- IOC posed tongues 27 are received, the said tongues being formed u on the outer side of' the tubular extension o the hub 20, as indcated. From thisn arrangement it should now be understood that by `rotating the 6 6 slot or sight-opening 9, which asses longitu-f Preferably .tremities of the clutch-bars 33.

ilnimb-heal 1G the drum 14 may be rotated, and by rotating the thumb-head 25 the wheel 17 may be rotated.

I provide means for locking the wheel and drum to each other in any position desired.

For this purpose the thumb-head 25 is adapt- The edges of these openings, which lie adjacent to the axis of the shaft, are oppositely beveled, so as to present angular.' edges or knife-edges 31. Opposite the openings 30 openings 32 are formed, which pass through the hub 20 and the disk-body 18 of the wheel 1 7, and through these alinin g openings clutch? bars 33 pass. These bars on their faces, which lie adjacent to the knife-edges 3 1, are provided with V-shaped notches 34, which are adapted to receive the knife-edges, as indicated in Fig.

33 proj ect into the interior of the wheel 1 7, and at this point they connect pivotally with links l35. Near the periphery of the wheel 17 the disk 18 thereof is formed with posts 36, and to these posts clutches 37 Vare pivotally attached, the said clutches comprising laterally-bent arms, which Vterminate in the shoes 33, lying adjacent to the inner face of the periphery of the drum 14, as shown. In this connection it should be stated that the circumferential wall of the drum 14 projects beyond the head 39 thereof which lies adjacent to the wheel 17.

Through the aforesaid collar 23 a pair of oppositely-disposed set-screws 40 project, and the extremities of these set-screws are received in the rear faces of the outer ex- From this arrangement it follows that when the thumb- I L head 25 is forced inwardly the clutcli-bars 33 are also projected inwardly, the innermost notches ecoming disengaged, as will be readily understood.

The inward movement of the clutch-bars will continue until the outer pair of the notches 34 come into alinemen't with the knife-edges 31, at which time the clutch mechanism will lock itself. When this oc- Vcurs, the shoes 38 will have been forced outwardly against the inner face of the drum in such a way as to bring about :i substantial frictional engagement therewith. When the thumb-head 25 is forced inwardly in this manner, the wheel 17 will be firmly locked to the drum, as will be readily understood.

Arrangement is made for normally maintaining the drum 14 in a certain position,

'which position would generally be called a fzero position. For this purpose on the interior of the drum a connterweight 41 is placed, and this 'weight normally gravitates o. At their inner extremities the clutch-bars to the lowest possible point, as indicated in Figs. 2 and 3, operating to maintain the drum in a corresponding position.

'In order to insure that the druin will stop at exactly the zero position, I provide a finper 42, of resilient material, as indicated in Fig. 2, which is formed with a nib 43, r cceived in a corresponding notch 44, the said notch being formed at the central line of the weight 41 on the outer face of the drum, as shown. y

Upon the outer surface of the drum 14 I attach a card 45 or sheet of'paper, u on which figures are arranged in tabulate form, so that the card constitutes a computing-table. rlhe quantities tabulated will dependupon the urposes for which the machine is to be used? However, in all cases the figures upon the card will be divided into circumferential and longitudinal rows, as shown. Upon the outer face of the wheel 17 a com uting-scale 46 is arranged circumferential y, and the entire length of this scale is formed in divisions wliich depend upon the character of the use to `which the machine is'to be' put. In .order to enable the figures of this scale to come accurately into alinement with the sight-opening 9, the periphery ofthe wheel i '17 is provided with corrugations or rounded teeth 47, as indicated in Fig. 5, and these teeth are arranged so that they corres ond in relation with the divisions on the'sca e 46. On the inner face of the case at a suitable point a detent-spring 48 is provided, formed with a, tip 49, which is received in one of the recesses between the teeth 47. From this arrangement it should be understood thatif the wheel were rotated slowly and intermittently the detent-spring 43 would tend to produce a s tep-by-step movement in which the divisions on the'scale 46 would aline successively withl the vsight-opening, and if the wheel were stopped in any position some one of the figopening 9.

The machine is especially adapted for coniputing the interest' on notes. When used in this capacity, the scale 46 is provided with circinnI'erential bands '50 and 51, which con-v stitnl e a calendar, and thel band 5() is divided into twelve principal divisions representing the months of the year, and a portion of this band 50 is Jformed with smaller divisions representing the days of each month. A corresponding arrangement is employed for the band 51; but the direction in which the bands, progress isreversed.

'l`he card upon the drum 14 is divided into three hundred and sixt -iive divisions corresponding. to the days ov the year, and at the right of the and at its edge which lies adjacent to the calendar figures are placed running from O"y to V365 in succession, so as toconstituteI the day-strip 52. Thus we have two bands upon which may be indi' 4,ures on the scale 46 would lie clearly in thel IIO 'indicate the number 'of days for which lthe note is to run. This relation is indicated in fthe. scalel showni'n Fig. 7, Which represents a lportion -of-the scale 11, referred to' above.

The body of thisscale is divided into sections representing the amounts of one dollar, two

Acorrespond to'diferent interest rates. The divisions of the sections correspond exactly' With-the divisions, measured. longitudinally upon the card45. Theentire surface of the 4looking upon the scale 11 inthe r$100 di' .card is divided ofi by circumferentiallines and horizontal lines, and in the squares so formed'nunibers are placed which correspond :tocertain interest rates and certain periods. Thus'the number. opposite the seventyeighth day of the daystrip and opposite the 9 in the one-dollar section of the scale 11 would. indicate the interest on 4one dollar at the rate of nine per cent. 'for a-period of seventy-eight days. In practice the dollar divisions upon the scale 11 would run successively up to one hundred, beyond which point they would bearranged inl hundreds, and afterward in thousands, progressing to- Ward the left end of the drum, as indicated in Fig. 1. y

From the arrangement described for the card 45 it should now be understood that lthe interest on any amount for a given number. of days may be 'readily computed. Suppose, for instance., that it Were desired to iind the interest upon one hundred and seventeen dollars for ninety days. The drum would be rotated until the number 00 in the daystrip 52 appears in the sight-opening 9. Then vision and at the corresponding interest rate sight-opening.

the amount of the interest for one `hundred dollars for the given time will appear in the The interest upon the seventeen' dollars would be found in the same Way, and these quantities added produce the result. The calendar 46 'enables the interest to be computed readily when the dates of making Yand of maturity of the note are known. Suppose that a note is dated January 19 and is to mature' March 15, the interi est rate being six per cent'. and the amount of the note seventy-five dollars. The wheel 17 would be rotated until the date January 19th on the calendar-band 50 comes opposite to the 0 4on the card 45, as indicated 1n Fig. 46. It should be stated at this point thatthefO on the lcard`45 would normally appear in the sight-opening 9. After the date January 19th." 1s brought int-o alinei .inent'with the 0 on the card 45, as indicated, the .thumbhead 25 would beppushed inwardly so as tolock the wheel 17 to the months and dates ofthe ,months of A fthe notes, yWhile we have a strip which' may drum. The lrim of thewheel .would then be rotated in an upward direction-that is, so

as to pass the months following January uponthe band 50 in succession under the opening. Thus the month February and the month March would pass until the date March 15th. Were reached. Opposite this date 1l/[arch 15t the number 55 will -appear on the day-strip of the card, showing that such a note would be for aperiod of iiftyfive days. The operator of the machine would. new look in the dollar-section `for 575/7 in the six-percentdivision thereof, and would see just above in the sight-open ing; the interest amount for the given note. While this method would be adopted for notes having dillerent dates .of maliiiig and maturity, another method would be adopted for computing' the intereston a number of notes allhaving the samel date of maturity. In bankspand similar institutions notes are constantly bein-g computed under these ein cumstances. Suppose that the interest upon a number of notes is to be computed, the said notes maturing on February 10. The wheel 17 would be rotated until the date February lOth" on the calendar-band 5l becomes opposite to the 0" mark. the 'wheel to this position, the thumbfhead 25 is pushed in so as to lock the wheel to the drum in the manner now Well understood.

Suppose now that the first note to be computed is dated January 1st." The u'heeli'" and drumw ould then be rotated until the date. January 1st" on the calendar-band 5l appears in the sifsrht-opemng- 0. lf the note is 'for one dollar at seven per cent., in the sight-' opening above the dollar-section in the sevenperfcent. division would be found the interest for this note. Tn the day-strip 52 would be found the number 40, indicating that the not-e will have run forty days. The other notes would be computed in the same Way, using the calendar-band 5l. this arrangement it will appear that the'calendar-bands, arranged as they are in. reverse order, enable the number of days to be computed quickly, counting in either direction, from the presentdate.

In order to facilitate the manipulation of the machine,l I provide a small rack 53, which .is preferal'ily atta 'hed to the upper side of ted, and in this rack the 4 notes may be pla ed so as to enable them to the case, as indi be readily seen (hiring the operation.

ln the manner described the amounts of interest would be computed for fractions of a year. In order to facilitate the computations for even numbers of yearsgas two years,.

` three years, four years, and'so onprovide the scale-or slide 13. This scale does not cooperate in any mami'er with the drum 14, but

does coperate with thescale 11 showing in tabulated form the interest amounts on notes for one, two, & c., 'to five years upon- IOO From

ITO

ISO

ving-wheel coaxial with said one dollar, .two dollars, three dollars, and so l the face of said drum, said drum having a reon. Thus upon this scale the interest on a note for two dollars at six per cent. -for two years would be found by looking at the scale 11 in the two-dollar section.' Above this scale is the six per cent. division, and in the two-year rate ot the scale 13 would be found the interest amount for this time.

Inconiputing the interest on notes running for an even number of years and a fraction the interest for the fractional time would be computed by means of the drinn and wheel, and this amount would be added to the interest amount taken from the scale 13, as will be readily understood.

While l have described the machine in its adaptation to the purpose ot computing the interest on notes, it is capable ot various other uses. When used tor other purposes, as suggested, the character of the scales and tables Would be changed to suit the particular units of measurement or requirements. rIhus it using the machine for measuring limiber the day-strip 52 would represent the Dumber ol" pieces ot lunib n* sold. The scale 11 would represent prices per thousand board teet and would contain characters indicating ditl'erent kinds of lumber-thus "2 X6 itl or (5 lt) 2', and so on. it itwere desired to lind the charge to be made for thirty pieces oiC hun ber ottwo inches by six inches by ten feet at sixteen dollars per thousand the drum would be turned until the ligure "3() at the right end of the drinn would appeal' in the sight-opening 9. Then on the drinn opposite characters 2X6- 1() would appear the iiunibei"L 300, iiidicating the board l'eet in the thirty pieces. Now turn drum until the ligure "300H appears in the sight-opening at the right. end. rlhen opposite it, which represents the price per tln-iusand, would be found on the diiim the number "4500." After pointing oilI three decimal-places the price, i'our dollars and eight-y cents, is obtained.

Having thus described my invention, l claim as new and desire to secure by Letters `PatentH i1 ln a machine of the class described, in conibinalion, acase presenting'a sight-opening, a drum containing tabulated figures rotatably mounted within said ense, a computdriiin and rotatably mounted within said case, a thumbliead adapted to rotaie said wheel and mechanism actuated by said thumb-head t'or locking said wheel to said drinn.

2. "ln a` machine of the class described, in combination, a case having a sight-opening therein, a drum rotatably mounted within said case and carrying tabulated ligures, a. coiinterweight on said drum adapted to maintain the same teiit-pawl carried by said case and engaging lrVith this arrangement tor the scales f in a normal position, de- 1 cess -cooperating with said deteiit-pa\\'l to maintain said drinn in said normal position. 3. ln a machine of the class described, in

combination, a case, a drum carrying coniputing-t'ables and rotatably mounted therein, a Wheel ctin'perating with said drum and rotatably mounted within said ease, a thumbhead making a tongue-and-groove connection with the hubof said wheel, and affording means for rotating said Wheel, and means actuated by the longitudinal movement ot said thumb-head for locking said Wheel to said drum.

4. In a machine ot the class described, in combination, a case, a drinn carrying coinputing-tables and rotatably mounted therein, ay thumb head lying outside of said case and adapted to rotate the said drum, a wheel rotatably mounted Within said case and cooperating with said drum, a thumb-head lying outside of said case and slidably mounted upon the hub of said Wheel, means tor locking said thumb-head and said Wheel against relative rota-tion whereby said thumb-head ail'ords means tor rotating said wheel, a' 4clutch between said wheel and said drum,

and a connection between said clutch and said thumb-head for actuating said clutch.

5. In a machine ot the class described, inv

combination, a case, a drum carrying computing-tables and rotatably mounted therein, a conipiiting-wheel coi'pei'ating with said drinn and rotatably mounted within said case, oppositely-disposed clutches between said wheel and said drum and adapted to lock the saine together, links connected with said clutches, a thumb-head adapted to rotate said wheel and. slidably mounted on the hub thereof, and clutch-bars carried by said thumb-heini and connected with said links.

6. ln a Amachine of the class described, in combination, a case, a drum carrying computing-tables and rotatably mounted therein, a ciimputing-wheel rotatably mounted within said case, a clutch between said Wheel and said drum, said wheel having a hub with laterally-projecting ears, said ears having guide-openings therethrough, clatcl'i-bars projectiiig through said giiide-o'pehings `and passing into the interioroi said wheel. links conneetingsaid clutch-bars with said clutches and a thumb-head attached to said clutchbars and affording means for thrusting,r the same inwardly and a connection between said thumb-head and said wheel toi' rotating said Wheel.

7. [n a machine of the class described, in combination, a case, a drinn carrying coin- 1piiting-rables and rotatably mounted therein, a conipnting-wheel rotatably mounted within said case and cooperating with said drum, clutches between said Wheel aiidsaid drum, links atlording means for operating said clutches, said wheel having a hub with IOfl IIO

iig:

` I clutcabarageitah i said Whee r is:

ffjrotatably mounted Within said case, shoes n laterally-dis' est through, saidopeningis presenting e.-.edges, 4

, i to said links passing through lk1.ijfe-'openings and presenting noifcliesj poperating' with said knife-edge lmeax'is' riding4 said clutch-bars Ithrough y'tlninib-head attached to said clutch-baisjand faie'rdin' means for rotating y .said Wheel; Saidthumbiead being slidably. mounted uporfsaid vhub and affording means l l,folithrustin 'fsaidclutehfbars inwardly to op- .erate-said e u'jtches. F'

8. flnfama'fh'in'e of the class described, in combinatienfa casefa drum carrying computing-tables and ,rotatably mounted there- 1n, a wheelc'peifating said drum and ears having openin s therecarried byv said Wheel andadapted'to'engageA said drum, links attachedjto said shoes and zolleading toward' the 'hubv off-said Wheel, a 'thumb-,head slidably mounted on said hub 'and connections from said thumb-head to n said links for opierating saidshoes.

notes, a table containing interest amounts and affording means for rotating said Wheel, 

